Seminar Topic on Nanoscience and Nanotechnology
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Seminar Topic on Nanoscience and Nanotechnology


.pdf   Nanoscience and Nanotechnology.pdf (Size: 62.59 KB / Downloads: 6)

To attempt to answer these questions,
first we must understand what nanotechnology
is. Well, it is not just all about size
1–100 nm. That is just a necessary condition,
but not sufficient. Most properties
do change when we go from bulk to
nanoscale, including physical, chemical,
mechanical, electrical, magnetic, optical,
and other properties. For example,
the melting point of gold is 1,064 °C
but a 5-nm gold particle melts nearly
200° sooner. The bandgap of silicon
goes from 1.1 eV to more than 3 eV for a
silicon nanowire of 3 nm.
Fitting into the enabling technology
pattern does not mean a guaranteed outcome.
As with every previous technology
wave, nanotechnology faces early challenges,
some of them familiar but several
are unique. Understanding the nature
and origin of these challenges is critical
to overcoming them and realizing its true
potential.
The first challenge is to recognize
that what we have had for the most part
to date is nanoscience and nanotechnology.
There is a tremendous difference
between the two, failure to understand
it is one major reason why most nano
startup companies in the United States
that started in the first two or three
years of the unveiling of the NNI have
already failed. Nanoscience is about
understanding the nanoscale properties,
discovery of nanomaterials, and demonstrating
their utility in some practical
area.
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